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This photo released on Thursday, Feb. 22, 2018 by the Syrian official news agency SANA, shows Syrian citizens at a street market in Damascus, Syria. As the Syrian government steps up its attacks on the opposition-held suburbs of Damascus, rebels in outlying towns are retaliating by sending volleys of mortar shells into the capital, killing more than 25 civilians in the past two weeks and spreading fear among its four residents. (SANA via AP)

Syrian opposition activists and residents of Damascus say the city and its embattled eastern suburbs are relatively calm following the U.N. Security Council's unanimous approval of a resolution demanding a 30-day cease-fire across Syria.

The activists reported few violations, including some clashes, on the southern edge of the rebel-held suburbs, known as eastern Ghouta, and two airstrikes late on Saturday, shortly after the resolution was adopted.

The Britain-based Syrian Observatory for Human Rights said Sunday no deaths have been reported since the resolution passed.

Ghouta-based opposition activist Anas al-Dimashqi says the night was calm but warplanes and drones are still flying over rebel-held areas.